Tag Archives: globe valve

Introduction of Globe Valves

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Cast Steel Globe Valve

A globe valves is a linear motion valve and are primarily designed to stop, start and regulate flow. The disk of a Globe valve can be totally removed from the flowpath or it can completely close the flowpath.

 

Conventional Globe valves may be used for isolation and throttling services. Although these valves exhibit slightly higher pressure drops than straight=through valves (e.g., gate, plug, ball, etc.), they may be used where the pressure drop through the valve is not a controlling factor.

 

Because the entire system pressure exerted on the disc is transferred to the valve stem, the practical size limit for these valves is NPS 12 (DN 300). Globe valves larger than NPS 12 (DN 300) are an exception rather than the rule. Larger valves would require that enormous forces be exerted on the stem to open or close the valve under pressure. Globe valves in sizes up to NPS 48 (DN 1200) have been manufactured and used.

 

Globe valves are extensively employed to control flow. The range of flow control, pressure drop, and duty must be considered in the design of the valve to avert premature failure and to assure satisfactory service. Valves subjected to high-differential pressure-throttling service require specially designed valve trim.

 

Generally the maximum differential pressure across the valve disc should not exceed 20 percent of the maximum upstream pressure or 200 psi (1380 kPa), whichever is less. Valves with special trim may be designed for applications exceeding these differential pressure limits.

 

Advantages

  • Can be fast-acting
  • Precise control
  • Can be used in high-pressure systems

 

Disadvantages

  • High head loss
  • Large opening for disk assembly
  • Heavier than other valves
  • Cantilevered mounting of the disk to the stem
  • Low coefficient of flow
  • Not good for clean or sterile applications

 

The most common application of the globe valve is a standard water faucet. When the handle is turned, a disc is lowered or raised. When the disc is fully lowered, the water supply is shut off.

 

Typical Applications Of Globe Valves Include:

  • Cooling water systems where flow needs to be regulated
  • Fuel oil systems where flow is regulated and watertightness is of importance
  • High-point vents and low-point drains when watertightness and safety are major considerations
  • Feedwater, chemical feed, condenser air extraction and extraction drain systems
  • Boiler vents and drains, main steam vents and drains, and heater drains
  • Turbine seals and drains
  • Turbine lube oil system

 

If you need more choice of globe valves, I recommend that you can visit Nico Valves Corp. – the company specializes in kinds of high quality valves including cast steel globe valve, gate valve, check valve, threaded valve, and much more. Now, welcome to check out Nico’s website and feel free to contact them.

 

Article Source: https://2bnews.wordpress.com/2018/07/10/introduction-of-globe-valves-2/

What is a Globe Valve and Where are They Used?

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Globe valves are linear motion valves that are widely employed to stop, start and throttle flow. In this article, we will have a simple introduction about globe valve function, advantages and disadvantages, and common applications of globe valves.

 

Globe valves are designed with a stem that moves up and down to regulate flow inside the valve, a disc (ball, composition, or plug) and seat, which is generally screwed into the valve body. Seats are designed in plane parallel or inclined to the line of the flow. These types of modulating valves are most commonly used to valve throttle, open or close flow in a system. The three basic globe valve body designs are Wye, Tee and Angle.

 

Advantages and Disadvantages of Globe Valves

 

Advantages:

 

  • Good shutoff capability.
  • Moderate to good valve throttling capability.
  • Shorter stroke (compared to a gate valve).
  • Easy to machine or resurface the seats.
  • Can be used as a stop-check valve.

 

Disadvantages:

 

  • Higher pressure drop (compared to a gate valve).
  • Requires greater force or a larger actuator to seat the valve.

 

Typical Globe Valve Applications

 

The following are some of the typical applications of globe valves:

 

  • Cooling water systems.
  • Fuel oil systems.
  • Feedwater or chemical feed systems.
  • Boiler and main steam vents and drains.
  • Turbine lube oil system and others.

 

NICO Valves Corp. is a leading industrial valve manufacturer in Taiwan and China and has been exporting this line of products for more than 20 years to all over the world.

 

We have full qualification for manufacturing widest kind of industrial valves in all common sizes & customized sizes, and available in ANSI, JIS, DIN standards. Its products includes: Gate, Globe, Check, Ball Valve, Knife Gate Valve, and Y-strainer. If you need more information about globe valves and other industrial valve series, welcome to browse NICO’s website or contact with us directly for further details!

 

 

Article Source: http://www.bmengineering.co.uk/news/globe-valves/what-is-a-globe-valve-and-where-are-they-used

 

Leading Industrial Globe Valve Manufacturer in Taiwan

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NICO Valves Corp. is a leading industrial valve manufacturer in Taiwan established in 1997. Our headquarters is based in Taichung, Taiwan, which operates the sales of Taiwan & worldwide and charges with R & D of the products. Our Shanghai plant is located in Shanghai, China and is specialized in the manufacturing and exporting the valves. We also have sales office at Shanghai which operates the sales in Mainland China.

 

Globe valve is one of our competitive products covering cast steel globe valve, cast stainless steel globe valve, forged steel globe valve, and forged stainless steel globe valve.

 

The strategy of Nico Valves Corp. was repeatedly making every endeavor for improvement in our globe valve to ensure quality reliability. Nico’s quality policy is to produce and develop globe valves that can satisfy customer’s requirement and also to be as: “Safe, Durable, and Economic”.